but the cursor goes to the next line and just sits, without anything else being output. The only way to get out is to hard close the SSH session.

Anyone have any ideas what I've done wrong? Do I really need the SSL stuff? All I want is a very simple mail server, with one or two email addresses. Nothing more fancy than that. Spam can be dealt with by my mail client so I'm not worried about SpamAssassin or anything like that.